looks just fine for me with the exact same pose, make sure to delete the old .var package because those morphs might be left over & add up to unrealistic resultsIt looks as if it has been stretched open by some transparent object, which is unnatural.
EDIT: the same issue was noticed by someone else and it is indeed caused by having both v2 & v1 packages (duplicate morphs), please delete the v1 package from your AddonPackages VaM folder and it should fix it
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